/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.miit.elearning.servlets;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Calendar;
import java.util.Set;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Session;
import ru.miit.elearning.hibernate.dao.CourseDAO;
import ru.miit.elearning.hibernate.dao.CurriculumDAO;
import ru.miit.elearning.hibernate.dao.HibernateUtil;
import ru.miit.elearning.hibernate.dto.CurriculumLevel;
import ru.miit.elearning.hibernate.dto.WorkItem;

/**
 *
 * @author Cyclone
 */
public class CompleteLabServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        Session session = null;

        try {

            int labId = Integer.parseInt(request.getParameter("labId"));

            session = HibernateUtil.getSessionFactory().getCurrentSession();
            session.beginTransaction().begin();

            CurriculumDAO curriculumDAO = new CurriculumDAO(session);

            int userId = curriculumDAO.findUserIdByLogin(request.getRemoteUser());

            //System.out.println(userId);

            curriculumDAO.completeLab(userId, labId);

            boolean courseCompleted = true;
            Integer courseId = null;
            try {
                CourseDAO courseDAO = new CourseDAO(session);
                CurriculumLevel course = courseDAO.findLab(labId).getCurriculumLevel();
                courseId = course.getId();
                Set<CurriculumLevel> labSet = course.getCurriculumLevels();
                for (CurriculumLevel lab : labSet) {
                    WorkItem wi = curriculumDAO.findWorkItem(userId, lab.getId());
                    if (wi == null || !wi.getActive()) {
                        courseCompleted = false;
                        break;
                    }
                }

            } catch (Exception e) {
                e.printStackTrace();
                courseCompleted = false;
            }

            try {
                if (courseCompleted && courseId != null) {
                    curriculumDAO.completeCourse(userId, courseId);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

            session.getTransaction().commit();

            Calendar cal = Calendar.getInstance();

            out.print("Выполнено "
                    + cal.get(Calendar.YEAR) + "-"
                    + (cal.get(Calendar.MONTH) + 1) + "-"
                    + cal.get(Calendar.DATE) + " "
                    + cal.get(Calendar.HOUR_OF_DAY) + ":"
                    + cal.get(Calendar.MINUTE)
                    + ";" + courseCompleted);

        } catch (Exception e) {
            if (session != null && session.isConnected()) {
                session.getTransaction().rollback();
            }

            e.printStackTrace();

        } finally {
            out.close();
            if (session != null && session.isConnected()) {
                session.close();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
